I learned with a very professional outfit and had around ten hours with my first instructor,he was very good and we are still friends,but I could not get a consistent landing .
The CFI took me under his wing ,we really got on together and my landings quickly improved .
I had two one hour sessions with other instructors mainly due to availability but the rest of my hours ( around 40) were with the CFI.
Unless things are definitely not right I would not like to change around because I think you form a rapport with a an instuctor and should stay with him.
Some students prefer one instructor ,others another but most importantly stick with what is working.
Good luck.
Lister
